Concept on positioning of Columns

1. As per the symmetry of the plan for both the axis is there

so we can conclude that plan is symmetry.

For redundancy in Xdirection Here All column are evenly spaced so the structure is more redundant at the X direction

For redundancy in y direction All column are less in no but evenly spaced so it is lesser reducdant

bi directional stiffness

In x direction lateral load passing from left end of the building will have straight path till right side frame is strong along X direction

In y direction column are not connected in straight direction so load can diverted into different direction so frame is weak along y direction

Ductility

There are more column in X direction so higher stiffness so reduce in ductlity

As there are zig zag way in y direction so higher ductlity

2. Vertical irregularity - building is larger in bottom stories than upper stories. so building must get crosschecked with IS code 1893-2016

Soft story - the building has opening in 6 th fllor so it is soft story building will lead to plastic hinge at column IS code 1893-2016 figure 4 A

Slopy base - the building is built on slopy ground this will lead to stiffness so few sotry may subject to soft story IS code 1893 - 2016 figure 5 E

3. A open ground floor - this denote soft story mechanism acting in the building

Room along 2 bay seperated by an open corridor - Bay filled with rooms will have higher mass compared to the middle bay left for corridor

Staircase portion on left corner - Staircase portion contain more stiffness in providing building plan

Two short side are filled with infill wall - it will more stiffer than longer side wwall

No framing connection in vertical direction

Varation in column sizes